AD9549ABCPZ Datasheet PDF - ADI

●Product Details

●The AD9549 provides synchronization for many systems, including synchronous optical networks (SONET/SDH). The AD9549 generates an output clock, synchronized to one of two external input references. The external references may contain significant time jitter, also specified as phase noise. Using a digitally controlled loop and holdover circuitry, the AD9549 continues to generate a clean (low jitter), valid output clock during a loss of reference condition, even when both references have failed.

●The AD9549 operates over an industrial temperature range of −40°C to +85°C.

●Applications

● Network synchronization

● Reference clock jitter cleanup

● SONET/SDH clocks up to OC-192, including FEC

● Stratum 3/3E reference clocks

● Wireless base stations, controllers

● Cable infrastructure

● Data communications

●### Features and Benefits

● Flexible reference inputs

● Input frequencies: 8 kHz to 750 MHz

● Two reference inputs

● Loss of reference indicators

● Auto and manual holdover modes

● Auto and manual switchover modes

● Smooth A-to-B phase transition on outputs

● Excellent stability in holdover mode

● Programmable 16 + 1-bit input divider, R

● Differential HSTL clock output

● Output frequencies to 750 MHz

● Low jitter clock doubler for frequencies >

●400 MHz

● Please see Data Sheet for additional features.